Gas Sensing Properties of Columnar CeO₂ Nanostructures Prepared by Chemical Vapor Deposition

Authors: Barreca, Davide; Comini, Elisabetta; Gasparotto, Alberto; Maccato, Chiara; Maragno, Cinzia; Sberveglieri, Giorgio; Tondello, Eugenio

Source: Journal of Nanoscience and Nanotechnology, Volume 8, Number 2, February 2008 , pp. 1012-1016(5)

Publisher: American Scientific Publishers

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Abstract:

Columnar CeO₂ nanostructures are grown on alumina substrates by a template- and catalyst-free Chemical Vapor Deposition (CVD) approach and subsequently tested as resistive gas sensors of CH₃COCH₃, H₂, NO₂. The sensor response is stable and reproducible throughout the whole working temperature range (200-500 °C) and directly dependent on the analyte gas and the adopted operating conditions. The higher sensitivity with respect to that displayed by continuous CeO₂ thin films demonstrates the potential of fabricating nanostructured sensing devices characterized by improved functional performances.

Keywords: COLUMNAR CEO2 NANOSTRUCTURES; CHEMICAL VAPOR DEPOSITION; GAS SENSORS

Document Type: Research article

DOI: http://dx.doi.org/10.1166/jnn.2008.080

Publication date: 2008-02-01

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Journal for Nanoscience and Nanotechnology (JNN) is an international and multidisciplinary peer-reviewed journal with a wide-ranging coverage, consolidating research activities in all areas of nanoscience and nanotechnology into a single and unique reference source. JNN is the first cross-disciplinary journal to publish original full research articles, rapid communications of important new scientific and technological findings, timely state-of-the-art reviews with author's photo and short biography, and current research news encompassing the fundamental and applied research in all disciplines of science, engineering and medicine.
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